Where do I find logic board for 1st generation iPod?

Hi. My late husband´s 1st generation iPod does not charge even after having it 12 hrs. on the charger. There is no display either. The computer does not recognize it. I read through your solutions and it seems to need a new logic board. You say you offer it but I couldn´t find it. I don´t know how much it costs or if it´s worth replacing it. I read the instructions and they don´t seem difficult to follow. There is a huge library of music in the iPod that my late husband loved. I would like to recover it if it can be done without a large expense. Thank you.